Improved machine for quarrying and dressing- stone



liutrd taire stent Chillida Vthis speciiication, in which-- FREDERICK TowNs'END,

YORK.

or ALBANY, NEW

l I Lette/rs Patent No. 98,317, dated December 28, 1869.

IMPROVED MACHINE FOR. QUARR'YIN G- ANI) 'DRESSING- STONE.

To all whom it may concern Be it known that I, FREDERICK TowssnND, of' the city and county of Albany, in the State of New York, have invented-a new and improved Machine for Quarrying Stone, and dressing the suricesoi' the same; and I do hereby declare that the following is a.V full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of ponding Ablocks of vstone therefrom; also, for chipping and smoothing or dressing the surfaces of stone.

lhe nature of my invention consists in the application, 'to the free end of a loaded, vibrating lever, of one or more stone-cutting or dressing chisels, and in giving to said lever strokes, varying in rapidity, by means of'a, crank-pin, working in a slot made through one arm of said lever, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I will describe its construction and 0peration. v

In the accompanying drawings- A represents a disk, which is keyed on one end of a driving-shaft, B, and which has iixed, eccentrically, into its face, a wrist-pin or crank, a. l

`This pin a works in a slot,'which is made through one arm, G, of a strong lever, and causes the lever 'to vibrate.

'lhe agrm D of said lever is loaded, and made of such size and shapeas will sustain it against shocks received in a direction transversely, with respect to its length, at the moment of giving the blows.

The shaft E has the loaded lever secured firmly to it, by means of a collar or hub, b, as shown in the drawings.

The chisel, or chisels c, as the-case may be,.are secured, iu any suitable manner, into the loaded end of the lever-arm D, in such position as will. cause the chisels to strike the stoneat the angle found best adapted i'orcutting or dressing.

'lhe drawings represent a single lever, applied upon a rock-shaft, E, and actuated by a crank-pin, playing in a slot inthe arm 0; but, if desirable; more than one ofthe loaded chisel-carrying arms D, may'ibe applied upon the rock-shaft E, and operated'by a sin'- gle crank-pin and slotted arm.

. In carrying my invention into eifect for quarrying stone, I shall mount the devices upon a truck or car# riage, provided with feed or propellingcontrivances for moving the chisels along ast-he work of channeling progresses, and also for vibrating the chisel-carrying arm or arms.

It-will be seen, from the abovc'description, and -thc accompanying drawings, that the loaded chisel-,carrying arm receives variable mot-ions; that by the revo-4 lution of the crank-,pin c, acting upon thearm C, the loaded ann is caused to receive a quick, jerking motion at the terminus of its descending strokes, and at the moment the chisel strikes the object to be cnt; and that the movement upward of this ann is at irst very quick, and then gradually retarded.

It-will also be seen that the action .of the wrist-pinl a upon'the arm G, duringy the descending, accelerated strokes'of the loaded arm D, will greatly add to the force of the blow; and while this is the case, the shocks, incident to the blows given to the chisel or chisels, will not be seriously felt by the machinery, as the radial distance between the fulcrum of saidarm D and wrist-piu a rapidly increases immediately after each blow, and allows the arm D to recoil withoutz' much resistance.

Having described my invention,

What I claim as new, and desire to secure by Let ters Patent, is-

A vibrating loaded arm, carrying one or more stone- A cutting or dressing chisels, and receiving its move- EREDK. TOWNSEND.

Witnesses W. S. OsBonN, H. I. NUGENT. 

